What are the main functions of the domain name system?

The main functions of the domain name system are domain name resolution, IP address management, load balancing, fault tolerance and recovery, domain name management and maintenance, etc. Detailed introduction: 1. One of the main functions of the domain name system is to convert the domain name entered by the user into the corresponding IP address. On the Internet, each device has a unique IP address, and the domain name is for the convenience of users to remember and use. exists; 2. The domain name system is also responsible for managing the allocation and management of IP addresses. Every device on the internet needs to have a unique IP address to communicate and more.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

Domain Name System (DNS) is a system used on the Internet to convert domain names into corresponding IP addresses. It is one of the infrastructures of the Internet and plays a very important role. The following is a detailed explanation of the main functions of the Domain Name System.

Domain name resolution: One of the main functions of the domain name system is to convert the domain name entered by the user into the corresponding IP address. On the Internet, each device has a unique IP address, and domain names exist for the convenience of users to remember and use. The domain name system allows users to access specific websites or services through simple domain names by resolving domain names into IP addresses.

IP address management: The domain name system is also responsible for managing the allocation and management of IP addresses. Every device on the Internet needs a unique IP address to communicate, and the domain name system plays a role in unified management and allocation of IP addresses by parsing domain names into IP addresses. The domain name server in the domain name system will record the IP address corresponding to each domain name and provide it to users when needed.

Load balancing: The domain name system can improve the performance and reliability of the website through load balancing. Load balancing refers to distributing user requests to multiple servers to reduce the load pressure on a single server. The domain name system can achieve load balancing by mapping one domain name to multiple IP addresses so that user requests can be distributed to different servers.

Fault tolerance and failure recovery: The domain name system can improve the reliability and stability of the system through fault tolerance and failure recovery mechanisms. When a server fails or is unavailable, the domain name system can forward the user's request to other available servers to ensure that the user's access is not affected. The domain name server in the domain name system will promptly update the IP address corresponding to the domain name to ensure that the user's request can be correctly forwarded to an available server.

Domain name management and maintenance: The domain name system is also responsible for managing and maintaining the registration and resolution of domain names. Domain names need to be registered before they can be used, and the domain name server in the domain name system will record the IP address corresponding to each domain name and provide it to users when needed. The domain name system also provides domain name management tools, allowing users to easily manage and maintain their own domain names.

To sum up, the main function of the domain name system is to resolve the domain name entered by the user into the corresponding IP address, manage and allocate IP addresses, achieve load balancing and fault tolerance and recovery, and provide domain name management and maintenance tools. These functions allow users on the Internet to access specific websites or services through simple domain names, and improve the reliability and stability of the system.

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